fix(get_any_ks_cf_list): use PageFetcher.fetch_all instead session.execute
fix(get_any_ks_cf_list): use PageFetcher.fetch_all instead session.execute

SnapshotOperation failed during longevity-multikeyspaces-60h test on snapshot validation.
The issue that in this test there are a 1000 ks and
'sdcm.cluster.BaseCluster.get_any_ks_cf_list' method didn't fetch all data.
Need to change session.execute to PageFetcher.fetch_all

scylladb/scylla-cluster-tests,scylladb/scylla-longevity-tests,scylladb/scylla-longevity-tests,scylladb/scylla-cluster-tests,scylladb/scylla-cluster-tests,scylladb/scylla-cluster-tests,scylladb/scylla-cluster-tests,scylladb/scylla-longevity-tests